As luck would have it I am about a 5 min drive from Akbar's (Birmingham). However, checked their menu and glad I did. No Charsi karahi. Indeed, no karahi dishes whatsoever, none, zip. Loads of balti dishes, but not a single karahi in sight. They don't even do their hot & spicy masala chips! So I ain't going there. Will have to wait until I am up Bradford way.
Anyway, had a couple of goes at making a Charsi. Firstly with 500 g fresh chicken on-the bone (niblets). Olive oil. Freshly ground black pepper. Other ingredients as per the Akbar's King of Curry video, but I splashed out on some Norfolk grown on-the-vine tomatoes. Provine variety. Awful, nasty, tasteless things. I won't buy these ever again. Excellent curry though. So light, but punchy, and a lovely fragrance. Had another sachet supper. The rest is still in the freezer. These sachets are costing me a fortune.
Next was with 400 g fresh breast. Butter ghee. Freshly ground black pepper, this time with 1/2 tsp turmeric and 1 tsp GM (Jalpur).

Good, but nowhere near as good as the first one. Unbalanced and much less fragrant. Still got plenty left in the freezer. It won't go to waste.
Couldn't resist a comparison with a tomato-based balti. Had some leftovers. So this is full-on 10/10 BTS (MDB MKI). Balti chicken (Rogan) with saffron rice.

Epic balti, as always. Still, the fragrance of the Charsi is remarkable and merits further investigation. Next time I will hand-pick some fresh tomatoes from a green grocer. Will have to take the plunge on a large bottle of olive oil. The price of it these days is hilarious.
Found this karahi vid. I have followed this chef for a while. He is smugger than me making Mick's balti, and that is saying something. Knows his stuff though. Some interesting tips and history of different karahi dishes in this one. The one he actually makes has no onions, garlic or ginger, or spices. I will be sticking with black pepper. There are of course loads of karahi varieties to try out. It's quite an adventure. Butt karahi next.
Rob